'He Was Cool and Calm'

Orlando police on Monday described how law enforcement had taken down Omar Mateen, the shooter who killed 49 people and wounded 53 at the Pulse nightclub early Sunday morning.

Chief John Mina said a uniformed off-duty officer at the club at the time of the shooting engaged in a shoot-out with Mateen up until more officers arrived. Additional police officers arrived and also began shooting at the suspect, and "forced him to stop shooting and retreat to the bathroom where he had some hostages.